Licensed casinos are monitored for slot fairness through a combination of regulatory oversight, third-party audits, and the use of certified gaming software. Regulatory bodies require casinos to adhere to strict standards for game fairness, including ensuring that slot machines operate with a random number generator (RNG) that is regularly tested for compliance. Independent auditors may also perform routine checks to verify payout percentages and randomness, ensuring that the machines function as advertised. These measures help maintain transparency and trust in the gaming process.